Started passing URLs as routes down to the Framework.

Author: gaaclarke

shell/platform/darwin/ios/framework/Source/FlutterAppDelegate.mm

@@ -4,10 +4,11 @@
 
 #import "flutter/shell/platform/darwin/ios/framework/Headers/FlutterAppDelegate.h"
 
-#include "flutter/fml/logging.h"
+#import "flutter/fml/logging.h"
 #import "flutter/shell/platform/darwin/ios/framework/Headers/FlutterPluginAppLifeCycleDelegate.h"
 #import "flutter/shell/platform/darwin/ios/framework/Headers/FlutterViewController.h"
 #import "flutter/shell/platform/darwin/ios/framework/Source/FlutterPluginAppLifeCycleDelegate_internal.h"
+#import "flutter/shell/platform/darwin/ios/framework/Source/FlutterEngine_Internal.h"
 
 static NSString* kUIBackgroundMode = @"UIBackgroundModes";
 static NSString* kRemoteNotificationCapabitiliy = @"remote-notification";
@@ -124,7 +125,28 @@ - (void)userNotificationCenter:(UNUserNotificationCenter*)center
 - (BOOL)application:(UIApplication*)application
             openURL:(NSURL*)url
             options:(NSDictionary<UIApplicationOpenURLOptionsKey, id>*)options {
-  return [_lifeCycleDelegate application:application openURL:url options:options];
+  if ([_lifeCycleDelegate application:application openURL:url options:options]) {
+    return YES;
+  } else {
+    UIViewController* rootViewController = _window.rootViewController;
+    if ([rootViewController isKindOfClass:[FlutterViewController class]]) {
+      FlutterViewController* flutterViewController = (FlutterViewController*)rootViewController;
+      [flutterViewController.engine
+          waitForFirstFrame:3.0
+                   callback:^(BOOL didTimeout) {
+                     if (didTimeout) {
+                       FML_LOG(ERROR)
+                           << "Timeout waiting for the first frame when launching an URL.";
+                     } else {
+                       [flutterViewController.engine.navigationChannel invokeMethod:@"pushRoute"
+                                                                          arguments:url.path];
+                     }
+                   }];
+    } else {
+      FML_LOG(ERROR) << "Attempting to open an URL without a Flutter RootViewController.";
+    }
+    return YES;
+  }
 }
 
 - (BOOL)application:(UIApplication*)application handleOpenURL:(NSURL*)url {

shell/platform/darwin/ios/framework/Source/FlutterEngine.mm

@@ -869,6 +869,18 @@ - (void)onLocaleUpdated:(NSNotification*)notification {
   [self.localizationChannel invokeMethod:@"setLocale" arguments:localeData];
 }
 
+- (void)waitForFirstFrame:(NSTimeInterval)timeout
+                 callback:(void(^_Nonnull)(BOOL didTimeout))callback {
+  dispatch_queue_t queue = dispatch_get_global_queue(QOS_CLASS_BACKGROUND, 0);
+  dispatch_async(queue, ^{
+    fml::TimeDelta waitTime = fml::TimeDelta::FromMilliseconds(timeout * 1000);
+    BOOL didTimeout = self.shell.WaitForFirstFrame(waitTime).code() == fml::StatusCode::kDeadlineExceeded;
+    dispatch_async(dispatch_get_main_queue(), ^{
+      callback(didTimeout);
+    });
+  });
+}
+
 @end
 
 @implementation FlutterEngineRegistrar {

shell/platform/darwin/ios/framework/Source/FlutterEngine_Internal.h

@@ -48,6 +48,8 @@
 - (void)notifyLowMemory;
 - (flutter::PlatformViewIOS*)iosPlatformView;
 
+- (void)waitForFirstFrame:(NSTimeInterval)timeout
+                 callback:(void(^)(BOOL didTimeout))callback;
 @end
 
 #endif  // FLUTTER_SHELL_PLATFORM_DARWIN_IOS_FRAMEWORK_SOURCE_FLUTTERENGINE_INTERNAL_H_